forked from OSchip/llvm-project
37 lines
1.4 KiB
LLVM
37 lines
1.4 KiB
LLVM
; RUN: opt < %s -memcpyopt -S | FileCheck %s
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; Handle memcpy-memcpy dependencies of differing sizes correctly.
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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; Don't delete the second memcpy, even though there's an earlier
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; memcpy with a larger size from the same address.
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; CHECK-LABEL: @foo
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define i32 @foo(i1 %z) {
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entry:
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%a = alloca [10 x i32]
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%s = alloca [10 x i32]
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%0 = bitcast [10 x i32]* %a to i8*
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%1 = bitcast [10 x i32]* %s to i8*
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call void @llvm.memset.p0i8.i64(i8* nonnull %1, i8 0, i64 40, i32 16, i1 false)
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%arrayidx = getelementptr inbounds [10 x i32], [10 x i32]* %a, i64 0, i64 0
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store i32 1, i32* %arrayidx
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%scevgep = getelementptr [10 x i32], [10 x i32]* %s, i64 0, i64 1
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%scevgep7 = bitcast i32* %scevgep to i8*
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br i1 %z, label %for.body3.lr.ph, label %for.inc7.1
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for.body3.lr.ph: ; preds = %entry
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %0, i8* %scevgep7, i64 17179869180, i32 4, i1 false)
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br label %for.inc7.1
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for.inc7.1:
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; CHECK: for.inc7.1:
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %0, i8* %scevgep7, i64 4, i32 4, i1 false)
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; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64(i8* %0, i8* %scevgep7, i64 4, i32 4, i1 false)
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%2 = load i32, i32* %arrayidx
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ret i32 %2
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}
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8*, i8*, i64, i32, i1)
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declare void @llvm.memset.p0i8.i64(i8*, i8, i64, i32, i1)
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